Four equal magnitude charges are placed at the corners of a square. Sketch a possible arrangement of the charges in which the net electric field at the center of the square points to the right.
a) All charges positive, arranged diagonally opposite.
b) All charges negative, arranged diagonally opposite.
c) Two opposite charges positive, other two negative, arranged diagonally opposite.
d) Two adjacent charges positive, other two negative, arranged diagonally opposite.
